Ovulation kits

Jesica
Hello all, I had a blighted ovum back in December, and i am still trying. Before the miscarriage i had no trouble with using the clearblue advanced ovulation kit and it being pretty accurate. Since then everything seems to have gone haywire and i am some months ovulating a week late and some months right on time. The advance started showing me days and days of high fertility. What would you ladies suggest i try to keep track of this? Thanks so much!